CN114008905A - Power conversion system - Google Patents
Power conversion system Download PDFInfo
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- CN114008905A CN114008905A CN201980097520.XA CN201980097520A CN114008905A CN 114008905 A CN114008905 A CN 114008905A CN 201980097520 A CN201980097520 A CN 201980097520A CN 114008905 A CN114008905 A CN 114008905A
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- 239000004065 semiconductor Substances 0.000 claims description 5
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- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
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- 230000004043 responsiveness Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
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- 239000007858 starting material Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/10—Control circuit supply, e.g. means for supplying power to the control circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
Abstract
In the present invention, a DC/DC converter (1) includes: a power conversion unit (3) for converting an input voltage into a required voltage; a first control unit (4) that drives the power conversion unit (3); a power supply device (5) that supplies power to the first control unit (4) and uses the output of the DC/DC converter (1) or the battery (100) as a power supply source; and a power supply function (6) for controlling power supply to the power supply device (5), the power supply function (6) controlling power supply by a second control section (10) of the power conversion device (2) during standby of the DC/DC converter (1).
Description
Technical Field
The present application relates to power conversion systems.
Background
Conventionally, in a power conversion device provided in one case, such as an in-vehicle charger, an AC/DC converter, a DC/DC converter, and an inverter, in order to drive these electric components, power is mainly taken from a lead battery (hereinafter, referred to as a low-voltage battery) mounted on a vehicle, and internal power is generated as a power supply source and supplied to each function.
In particular, from the viewpoint of improving the merchantability of power components, it is required to improve the efficiency of an auxiliary power supply for operating the power converter itself in addition to the power conversion efficiency, and further to suppress the standby power. For example, when a DC/DC converter that converts power from an on-vehicle high-voltage battery such as a lithium battery to a low-voltage battery is driven with a light load, the efficiency (loss) of the auxiliary power supply cannot be ignored in terms of the loss rate of the entire power components. In addition, in order to suppress the battery from running out, etc., the standby power of the auxiliary power supply system needs to be reduced.
Patent document 1 discloses a case where a current supply circuit capable of reducing dark current or power consumption is provided. That is, such a current supply circuit includes: a supply circuit that supplies a current having the same magnitude as a reference current generated based on a power supply voltage to another circuit; a power supply fluctuation prediction unit that predicts a fluctuation of the power supply voltage based on a load state; and a reference current varying means for varying the magnitude of the reference current when the variation of the power supply voltage is predicted, whereby the reference current varying means increases the reference current more than usual only when the variation of the power supply voltage of the power supply unit is predicted by the power supply variation predicting means. Thus, a current supply circuit capable of reducing dark current or power consumption can be provided.
As described above, the power converter is configured to convert the power from the main power supply and supply the converted power to the auxiliary device not only in the normal operation state but also in the standby state, and therefore, an auxiliary battery is not required. Further, it is disclosed that power consumption is effectively reduced by appropriately controlling the auxiliary voltage supplied in the auxiliary state.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2008-195110
Patent document 2: japanese patent laid-open No. 2015-119553
Disclosure of Invention
Technical problem to be solved by the invention
In a conventional power conversion device in which a plurality of components such as an inverter and a converter in the power electronics field are integrated, particularly in a DC/DC converter, it is preferable to configure an auxiliary power supply circuit configuration using a low-voltage battery line as a supply source in order to reduce product cost and size and reduce loss, but standby power is problematic.
In order to cut off the standby power, patent document 1 discloses a method in which an ignition switch is provided between a power supply unit and a current supply circuit, and the standby power when the operation of the circuit itself is stopped is generally cut off by opening and closing the ignition switch.
In addition, in patent document 2, the power converter is controlled in accordance with the operation or standby state of the auxiliary machine to adjust the value of the power supply voltage supplied to the auxiliary machine, thereby suppressing the standby power. However, when such a method is applied to a DC/DC converter that converts power from a high-voltage battery to a low-voltage battery, the amount of energy taken from the high-voltage battery in a standby state cannot be ignored. In particular, when power for directly driving the power conversion unit from the DC/DC converter output line is to be supplied, the main circuit must always continue to operate. In order to reduce the standby power of the corresponding converter, the power conversion operation of the main circuit is stopped during standby and the standby power of the power circuit section driving them is suppressed, so that the total energy balance of the power conversion device is best.
The present application discloses a technique for solving the above-described problem, and an object of the present application is to suppress standby power in a power supply device or a control unit of a DC/DC converter by controlling supply or stop of power supply by a power supply function during a stop of operation of the DC/DC converter.
Means for solving the problems
The power conversion system disclosed in the present application includes a DC/DC converter that charges a battery, and a power conversion device constituted by at least one of an inverter and a converter,
the DC/DC converter includes: a power conversion unit for converting an input voltage to a desired voltage; a first control unit that drives the power conversion unit; a power supply device that supplies power to the first control unit and uses the output of the DC/DC converter or the battery as a power supply source; and a power supply function for controlling power supply to the power supply device,
the power supply function controls power supply by a second control section of the power conversion device during standby of the DC/DC converter.
In addition, another power conversion system disclosed in the present application includes a DC/DC converter that charges a battery, and a power conversion device constituted by at least one of an inverter and a converter,
the DC/DC converter includes: a power conversion unit for converting an input voltage to a desired voltage; a first control unit that drives the power conversion unit; a power supply device that supplies power to the first control unit and uses the output of the DC/DC converter or the battery as a power supply source,
the power conversion system is further provided with a power supply device output on/off function that instructs the power supply device of output permission and output stop, the power supply device output on/off function controlling power supply by a second control section of the power conversion device during standby of the DC/DC converter.
Effects of the invention
According to the power conversion system disclosed in the present application, the power supply from the other power conversion device is controlled during the stop of the operation of the DC/DC converter, and the power supply is controlled by the power supply function, whereby the standby power in the power supply device or the control unit of the DC/DC converter connected to the battery can be suppressed.
Drawings
Fig. 1 is a block diagram showing a basic configuration of a power conversion system according to embodiment 1.
Fig. 2 is a block diagram showing a configuration of a power conversion system according to embodiment 1.
Fig. 3 is a block diagram showing a configuration of a power conversion system according to embodiment 2.
Fig. 4 is a block diagram showing a configuration of a power conversion system according to embodiment 3.
Detailed Description
Embodiment 1.
The present embodiment relates to a standby power reduction system for a control power supply circuit in a power conversion device in which a plurality of components such as an inverter and a converter in the power electronics field are integrated.
Fig. 1 is a block diagram showing a basic configuration of a power conversion system according to the present embodiment. The power conversion system includes a DC/DC converter 1 that charges a low-voltage battery 100, and another power conversion device 2 composed of a plurality of inverters or converters. That is, the power conversion device 2 is constituted by at least one of an inverter and a converter. The DC/DC converter 1 includes a power conversion unit 3, a control unit (1 st control unit) 4, and a power supply device 5. The power conversion unit 3 converts the input voltage into a desired voltage. The control unit 4 drives the power conversion unit 3. The power supply device 5 supplies power to the control unit 4. The power supply device 5 uses the output of the DC/DC converter 1 itself or the low-voltage battery 100 as a power supply source, and is provided with a power supply function 6 for controlling supply or stop of power supply thereto.
A DC/DC converter 1 that charges the low-voltage battery 100 and another power conversion device 2 composed of a plurality of inverters, converters, or the like are stored in one case, and the respective structural components are controlled based on instructions or operations from the outside.
Then, the purpose of the present embodiment is to control the supply of power by the other power conversion device 2 and to suppress standby power in auxiliary devices such as the power supply device 5 and the control unit 4 of the DC/DC converter 1 connected to the low-voltage battery 100 by controlling the supply or stop of the supply of power during the operation stop of the DC/DC converter 1.
Fig. 2 is a block diagram showing a configuration of a power conversion system according to the present embodiment. In fig. 2, a DC/DC converter 1 for charging a lead battery 100 (so-called low-voltage battery) of a high-voltage battery 200 to 12V series such as a lithium battery, and another power conversion device 2 including a plurality of inverters or converters are provided. The DC/DC converter 1 includes a control section 4 for driving the DC/DC converter 1 and a power supply device 5 for supplying power to the control section 4. The power supply device 5 is provided with a switch 7 for controlling supply or stop of power supply, using the output of the DC/DC converter 1 itself or the low-voltage battery 100 as an energy supply source.
DC/DC converter 1 and another power conversion device 2 are stored in one case, and each component is independently controlled based on communication information from another external ECU300 mounted on the vehicle. The DC/DC converter 1 has a function for charging the low-voltage battery 100 from the high-voltage battery 200 such as a lithium battery, and performs charging control based on instruction information from the vehicle. DC/DC converter 1 includes power conversion unit 3 for converting power of energy transferred from high-voltage battery 200 to low-voltage battery 100, control unit 4 for controlling power conversion unit 3, and power supply device 5 for driving these components.
The power converter 3 is a power converter for converting power from the high-voltage battery 200 to the low-voltage battery 100, and is composed of a SEMICONDUCTOR power device such as a METAL-OXIDE-SEMICONDUCTOR field EFFECT TRANSISTOR (MOSFET) or an INSULATED GATE BIPOLAR TRANSISTOR (IGBT), and main circuit components such as a coil, a capacitor, and a transformer.
For example, in the case of an insulated DC/DC converter, an H-bridge circuit including 4 MOSFET devices is driven to transfer power from a primary side to a secondary side of a transformer, and then the power is rectified by a diode to flow a current through a coil and a capacitor.
The control unit 4 drives the power conversion unit 3, and drives the main circuit so as to obtain a desired output in the power conversion unit 3 based on various information such as a current sensor, a voltage sensor, and command information from the external ECU 300. The control unit 4 periodically acquires physical observation values based on a current sensor, a voltage sensor, and the like, and notifies the external ECU300 using CAN (CONTROLLER AREA NETWORK) communication or the like. When detecting an operational abnormality or failure in the power converter, sensor information from a current sensor, a voltage sensor, or the like acquired by the control unit 4 is notified to the external ECU300 using CAN communication or the like.
The power supply device 5 is a power supply circuit for supplying power to the control unit 4, and uses the output of the DC/DC converter 1 or the low-voltage battery 100 as a power supply source.
The switch (power supply function) 7 controls supply or stop of power supply by the control section (2 nd control section) 10 of the other power conversion device 2 while the DC/DC converter 1 is in standby. The power supply device 5 uses the line of the low-voltage battery 100 as a supply source, and the switch 7 controls the supply or stop of the power supply by the control unit 10 of the other power conversion device 2.
As another power conversion device 2, there is an inverter for driving a motor (corresponding to load 400 in fig. 1 to 4) for running the vehicle. Or as another power conversion device 2 is an inverter for driving a generator for returning energy to the high-voltage battery 200 as regenerative energy at the time of deceleration of the vehicle, there is an inverter connected to a motor for power generation (equivalent to the load 400 of fig. 1 to 4) for transferring the regenerative energy induced in the motor for power generation at the time of deceleration of the vehicle to the high-voltage battery 200 for converting ac power from the motor for power generation into dc power.
Further, as the other power conversion device 2, there is a charger for charging the high-voltage battery 200 from a system (corresponding to the AC power supply 400 in fig. 1 to 4), and the system refers to the AC power supply 400 shown in fig. 1 to 4, and it is conceivable to charge the high-voltage battery 200 using the other power conversion device 2 as the charger. Alternatively, another power conversion device 2 is an inverter of an electric motor (corresponding to the load 400 in fig. 1 to 4) for an air conditioner unit (electric a/C compressor) driven by the high-voltage battery 200.
In any application, the basic configuration of the power converter 2 is composed of a power converter 9, a controller 10 for controlling the power converter 9, and a power supply device 11 for driving the power converter 9 and the controller 10. Based on the start information from external ECU300, control unit 10 controls the switching of switch 7, and supplies power from low-voltage battery 100 to power supply device 5 of DC/DC converter 1.
The control unit 10 is equipped with a microprocessor (hereinafter referred to as a microcomputer), a DSP (DIGITAL SIGNAL PROCESSOR: digital signal processing), a dedicated control IC (INTEGRATED CIRCUIT: integrated circuit), or other high-speed arithmetic devices, for performing optimized motor control based on various information such as a current sensor, a voltage sensor, and command information from the external ECU300, in addition to the inverter, the generator, and the boost converter.
Conventionally, in both of the power conversion devices 1 and 2, a control unit includes a microcomputer, and a converter control IC exclusively used for power conversion control is applied to the converter. The microcomputer has a function common to power conversion devices such as a communication interface with the external ECU300 and sensors for observing desired voltage, current, temperature, and the like. Therefore, it is possible to reduce the cost by integrating the function into one of the microcomputers in the power conversion device and deleting the other microcomputer. Therefore, for example, by applying a high-function microcomputer as the control unit 10 of the power conversion device 2 and integrating the control unit 4 as the converter control IC into the microcomputer, it is possible to realize both functions with a configuration that is inexpensive in total cost.
In this case, the control portion 10 performs the above-described failure detection or communication with the external ECU 300.
The control unit 4 and the power supply function 6 are controlled by, for example, an arithmetic processing device (a microprocessor, a monitoring IC, or the like) in the control unit 10 of the other power conversion device 2 based on information of the ECU300 inside and outside the power conversion device 2.
The power supply device 11 supplies power to the control unit 10 via a harness 101 different from the output system of the DC/DC converter 1. The power supply system for driving the control unit 4 and the power supply device 5 of the DC/DC converter 1 is different from the power supply system for driving the other power conversion device 2. That is, energy is taken out from the control unit 4 of the DC/DC converter 1 via the output cable 102, whereas energy is taken out from the other power conversion device 2 via the harness 101 different from the one. Therefore, even if one of the power supply systems is disconnected, the other power conversion device is not affected.
The output cable 102 is a conductor for supplying power from the DC/DC converter 1 to the low-voltage battery 100 (the arrow of fig. 2 indicates this case). In the present embodiment, power for driving the control unit 4 is also obtained from the low-voltage battery 100 by the output cable 102. That is, power is obtained from low-voltage battery 100 at the time of startup, and the output of DC/DC converter 1 itself is normally used as a power supply source.
A switch 13 is provided between the power supply device 11 and the low-voltage battery 100, and the switch 13 supplies energy to the power supply device 11 by driving the starter circuit 12 with a signal from the external ECU 300.
As the switch 13, various switches such as a mechanical relay and a semiconductor element can be used. In contrast, a semiconductor element is used as the switch 7. Thereby, durability can be improved compared to a mechanical switch, and therefore, durability of the corresponding functional portion of the product can be improved or a mounting area can be reduced.
With such a configuration, the switch 7 is turned off in advance when the operation of the DC/DC converter 1 is stopped, and the standby power can be reduced.
Further, although the conventional monitoring-dedicated IC is used as described above, the control unit 10 of the other power conversion device 2 can omit components such as the monitoring-dedicated IC by replacing the monitoring path, and thus the number of components can be reduced, thereby achieving a reduction in size of the product.
In the other power supply path (harness 101), loss generation factors such as a relay, a fuse, and a reverse diode are present between the low-voltage battery 100 and the auxiliary power supply. Therefore, when the DC/DC converter 1 is used in common with another power supply path, the power supply through the power supply path cannot be stopped even when the operation of the DC/DC converter 1 is stopped. The DC/DC converter 1 is better than each auxiliary power supply in terms of power supply efficiency. As described above, by arranging the switch 7 as shown in fig. 2, energy flow can be formed on an optimum path including each auxiliary power supply structure, and therefore, the total loss of the power structure components can be reduced.
In addition, as described above, even in the case where the function of one power conversion apparatus located within the power conversion apparatuses is disabled by separating the power supply system, the function of the other power conversion apparatus is not affected. Therefore, the power conversion device side that is active can continue to operate.
In addition, the standby power when the operation of the component is stopped can be reduced by a simple circuit configuration.
Further, even in a case similar to the conventional case, since the microcomputers are provided in the DC/DC converter 1 and the power conversion device 2, a communication delay between the DC/DC converter 1 and the power conversion device 2 and a timing shift in the cooperative operation occur. However, by integrating a microcomputer common to both the DC/DC converter 1 and the power conversion device 2, it is possible to eliminate delay and timing offset.
Further, by switching the switch 7 of the DC/DC converter 1 by the power conversion device 2, the power supply can be stopped when an internal failure or an error of the DC/DC converter 1 occurs, and a secondary failure can be suppressed. Further, the responsiveness when the switch 7 of the DC/DC converter 1 is switched by the power conversion device 2 is better than the responsiveness when the power output function is switched based on the external activation signal, and unnecessary power consumption can be suppressed when the DC/DC converter 1 does not need to be charged. For example, in the case where the input stop condition is satisfied, directly turning on the switch 7 from the power conversion device 2 can shorten the response time as compared with turning on the switch 7 from the power conversion device 2 via the external ECU 300.
Fig. 3 is a block diagram showing a configuration of a power conversion system according to embodiment 2. As shown in fig. 3, a power supply apparatus output on/off function 8 that instructs the power supply apparatus 5 to permit and stop output is provided. A power supply device output on/off function 8 is used in place of the switch 7. The power supply device output on/off function 8 is controlled by the control unit 10 in the same manner as in embodiment 1.
This can reduce the number of components, and therefore, the power conversion system can be constructed with a cheaper structure, and the same effects as those of embodiment 1 can be achieved.
Fig. 4 is a block diagram showing a configuration of a power conversion system according to embodiment 3. As shown in fig. 4, a power supply apparatus output on/off function 8 that instructs the power supply apparatus 5 to permit output and stop output is provided. And outputs an on/off function 8 and a switch 7 by a power supply device. That is, the DC/DC converter 1 is started or stopped by the other power conversion device 2 driving both the switch 7 and the power supply device output on/off function 8.
When the switch 7 is broken or when the power supply device output on/off function 8 fails, there is a possibility that the standby power increases and the battery runs out, but by using the power supply device output on/off function 8 and the switch 7 in combination, the switch function is made a redundant system, so that even if one component fails, the function of switching the power supply line can be maintained by the other switch function.
The number, size, material, and the like of the other constituent members can be appropriately changed.
Although various exemplary embodiments and examples have been described in the present application, the various features, modes, and functions described in 1 or more embodiments are not limited to the application to specific embodiments, and may be applied to the embodiments alone or in various combinations.
Therefore, countless modifications not shown by way of example can be conceived within the technical scope disclosed in the present application. For example, the present invention includes a case where at least one of the components is modified, added, or omitted, and a case where at least one of the components is extracted and combined with the components of the other embodiments.
Description of the reference symbols
1 DC/DC converter
2 power conversion device
3 power conversion part
4 1 st control part
5 Power supply device
6 power supply function
7 switch
8 power supply device output on/off function
10, 2 nd control part.
Claims (7)
1. A power conversion system, characterized in that,
includes a DC/DC converter for charging a battery, and a power conversion device constituted by at least one of an inverter and a converter,
the DC/DC converter includes: a power conversion unit for converting an input voltage to a desired voltage; a first control unit that drives the power conversion unit; a power supply device that supplies power to the first control unit and uses the output of the DC/DC converter or the battery as a power supply source; and a power supply function for controlling power supply to the power supply device,
the power supply function controls power supply by a second control section of the power conversion device during standby of the DC/DC converter.
2. The power conversion system of claim 1,
the power supply function is constituted by a switch.
3. The power conversion system of claim 2,
a semiconductor element is used as the switch.
4. The power conversion system according to any one of claims 1 to 3,
a power supply device output ON/OFF function is provided for instructing the power supply device to permit and stop output.
5. The power conversion system of any of claims 1-4,
a power supply system for driving the first control section and the power supply device in the DC/DC converter is different from a power supply system for driving the power conversion device.
6. The power conversion system of any of claims 1 to 5,
the second control portion controls the first control portion and the power supply function based on information of the internal and external ECUs of the power conversion apparatus.
7. A power conversion system, characterized in that,
includes a DC/DC converter for charging a battery, and a power conversion device constituted by at least one of an inverter and a converter,
the DC/DC converter includes: a power conversion unit for converting an input voltage to a desired voltage; a first control unit that drives the power conversion unit; a power supply device that supplies power to the first control unit and uses the output of the DC/DC converter or the battery as a power supply source,
the power conversion system is further provided with a power supply device output on/off function that instructs the power supply device of output permission and output stop, the power supply device output on/off function controlling power supply by a second control section of the power conversion device during standby of the DC/DC converter.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2019/024494 WO2020255330A1 (en) | 2019-06-20 | 2019-06-20 | Power conversion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114008905A true CN114008905A (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980097520.XA Pending CN114008905A (en) | 2019-06-20 | 2019-06-20 | Power conversion system |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20220173658A1 (en) |
| EP (1) | EP3989423B1 (en) |
| JP (1) | JP7002701B2 (en) |
| CN (1) | CN114008905A (en) |
| WO (1) | WO2020255330A1 (en) |
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| JP2011172422A (en) * | 2010-02-20 | 2011-09-01 | Diamond Electric Mfg Co Ltd | Control power supply system and vehicular power conversion apparatus with the same |
| US20120106218A1 (en) * | 2010-11-01 | 2012-05-03 | Mitsubishi Electric Corporation | Power conversion apparatus |
| CN102742137A (en) * | 2009-11-30 | 2012-10-17 | 松下电器产业株式会社 | Power supply device and method for controlling same |
| CN102856946A (en) * | 2011-06-28 | 2013-01-02 | 株式会社东芝 | Energy storage apparatus and energy storage system |
| CN110062989A (en) * | 2016-10-21 | 2019-07-26 | 日产自动车株式会社 | Power-supply system and its control method |
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| JP2864153B2 (en) * | 1990-06-29 | 1999-03-03 | 富士通株式会社 | DC / DC converter |
| JP2008195110A (en) | 2007-02-08 | 2008-08-28 | Fujitsu Ten Ltd | Current supply circuit |
| JP4775717B2 (en) | 2007-09-25 | 2011-09-21 | エヌイーシーコンピュータテクノ株式会社 | Power supply system, internal circuit driving method, and program thereof |
| JP5575185B2 (en) * | 2012-06-15 | 2014-08-20 | オムロンオートモーティブエレクトロニクス株式会社 | Vehicle power supply control device |
| JP6008668B2 (en) * | 2012-09-19 | 2016-10-19 | シャープ株式会社 | Power conversion device, power storage system, and power storage method |
| JP2015119553A (en) | 2013-12-18 | 2015-06-25 | 株式会社豊田中央研究所 | Auxiliary equipment power unit |
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| JP6748921B2 (en) * | 2017-06-28 | 2020-09-02 | 株式会社オートネットワーク技術研究所 | In-vehicle power supply circuit and in-vehicle power supply device |
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2019
- 2019-06-20 JP JP2021528563A patent/JP7002701B2/en active Active
- 2019-06-20 US US17/599,841 patent/US20220173658A1/en active Pending
- 2019-06-20 WO PCT/JP2019/024494 patent/WO2020255330A1/en active Application Filing
- 2019-06-20 CN CN201980097520.XA patent/CN114008905A/en active Pending
- 2019-06-20 EP EP19934276.7A patent/EP3989423B1/en active Active
Patent Citations (5)
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| CN102742137A (en) * | 2009-11-30 | 2012-10-17 | 松下电器产业株式会社 | Power supply device and method for controlling same |
| JP2011172422A (en) * | 2010-02-20 | 2011-09-01 | Diamond Electric Mfg Co Ltd | Control power supply system and vehicular power conversion apparatus with the same |
| US20120106218A1 (en) * | 2010-11-01 | 2012-05-03 | Mitsubishi Electric Corporation | Power conversion apparatus |
| CN102856946A (en) * | 2011-06-28 | 2013-01-02 | 株式会社东芝 | Energy storage apparatus and energy storage system |
| CN110062989A (en) * | 2016-10-21 | 2019-07-26 | 日产自动车株式会社 | Power-supply system and its control method |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3989423A4 (en) | 2022-06-15 |
| WO2020255330A1 (en) | 2020-12-24 |
| JP7002701B2 (en) | 2022-01-20 |
| JPWO2020255330A1 (en) | 2021-10-21 |
| US20220173658A1 (en) | 2022-06-02 |
| EP3989423B1 (en) | 2023-05-24 |
| EP3989423A1 (en) | 2022-04-27 |
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